Cinematograph-projector.



F. M. H. WUNDERLICH.

ClNEMATOGHAPH PROJECTOR.

APPHcATmN HLED MAR.20,1914.

-a'ented Nov. 30, 1915.

2 SHEETS-SHEET l.

F. M. H. WUNDERLICH.

CINEMATOGRAPH PROJECTOR.

APPLiCATiON FILED MMLZO, i914. .A 1,162,430. Patented Nov. 30, 1915.

l 2 SHEETS-SHEET 2.

Figi. Y'

'UNTTED STATES enfrente ormon- CINEMATOGRAP Application filed March 20,

'a specification.

The present invention relates to projectors for cinemhtographs, in which the ilm' guide and the feed mechanism are incased in a ireproof manner.

The invention in particular consists in improvements by which the. safety against p dangerof rire is further increased.

lilith the arrangements hitherto employedv lthe film passages from the feeding drum and to Vthe winding drumccnncct at the top and the bottom to the fireproof casing. l/Vithin the undivided interior chamber of the casing the film, however, travels quite free, as far as it is not covered by the flat tubular or sheathlike'iilm guides. Thus a film lire, which generally occurs at the window, cannot strike OUt'Othe casing, and can neither reach the film wound on eitherI of the ltwo drums. But the iiames Will seize that part of the film which istraveling quite open within the casing beyondv thc lilm guides. The loss entailed thereby v could be borne, as it is only comparatively small and will comprise only a moderate number of pictures, which may be dispensed with for the further use of the film. Much worse, however, it is when the lilm breaks, and, because of careless attendance, this is not. inetant-ly observed. Then the film which is being continuously fed, will collect in 'serpentine lines in the casing instead of passing straight through it, and these loops of film will be sni'iiciently long in the proximity i tion of large lengths of lilm entailing danobserved.

of the llames and the heat to be also set alire. The result will be a considerable loss ot lilm length and, under circumstances, it may even lead to an explosion like combusger both for human beings and the premises. If such ruptureoi` the lilm occurs beneaththe window, so that the kinetoscopic picture apparently continues in a regular manner, it will even not be necessary forithe operator to be very careless vto allow of such choking of the film in the casing to pass un- A further deliciency in the arrangement.

Speciicaton'of Letters Patent.

H-TDROJECTOR.

1914.v Seri3lN0.825,026. p

hitherto employed consists that the proper closing ot the door of the casing, which door has to be opened each time a' fresh lilm is introduced, is not enforced or safeguarded in any way.

It is the object of the present invention to remedy these deiciencies.

On the one hand the range of the window and the path of the rays, within which the inllammation of the film might occur, are separated from the other part of the casing, in which the lm travels open and where it may accumulate, by means of partitions. This improvement may be effected in different manners. In cach instance the object is to join the rear and front -walls of the casing with the film guide all around the window by means of partitions'. The most natural form of such partitions is atubular or funnel shape, in which Acase a kind ot' tunnel is carried through the interior chamber. But'also horizontal partitions or walls may be arranged above and below the window, extending across thewhole width of the casing and thus forming in the said cas ing an upper admission chamber, a middle chamber open at both sides for the passage of the rays of light, and `a lower outlet chamber. This subdivision of the' casing may,'however, also be obtained by aidof -its cuter walls, so that instead of one integral casing two completely separate cas-v ings, which are. connected only by the sheathlike hlm guide and the necessaryparts of the framing, namely one upper or admis-y Patented Nov. so, i915.y

the lens is fitted in the front 'flange of the angle. This arrangement doesnot only allow otopening a very great part of the works with one single door, but also obliges the. operator to really close the4 casing Yand `keep it closed during the projection, as the lens will be broughtinto its proper position only bythe closing of this door.

Figures 1*-3 of the drawing illustrate a constructional form of the invention. Fig. l is a side view with opened door, Fig. 2 is a vertical longitudinal section,'and Fig. 3 is a cross section. y

The casing which is made of one integral part in this constructional form consists ot means for moving the en the drawing They do not form `rays from the other the base l which also forms the bottom 2, ne roof' and the fixed Walls l and 5. To the side walls el connects the angular dooi` consisting of the Walls 7 and 8. The Wall 'l contains, the inspection Windou7 9 which is covered with glass or mica. In the forward wall 8 the lens l0 is fitted. The door 7-8 is locked by locking means il, 12, 13 or by any other suitable device. These locking means are preferably so arranged, that they engage automatically as soon as the door is nini/ed into closing pcsitinn.

above the casing the film drain le, and beneath the film drum 15 are arranged. 130th urns are conncctedin a fireproof manner v en the roof 3 and the botten .2 of the casby means of the sheaths lfd and l? respectively. Within the casing is arranged 'he filin guide 18 with the window 19. 'lhe film band are shown only as far as' it was necessary for explaining the'present invention.

a part of the present invention. lt may only be said that the parts -21 draw the film from the drum 1% and feed it to the guide 18, that the parts' intermittently advance the lilm band through 'the guide 18 and that the parts take the fihn band tothe Winding drum l5.

The rear Wall of the casing is ,connected with the ilm guide i8 by means of the tube or funnel 26, through which the light passes to the lens from the condenser lenses, as is customary in these projectors. rlhese condenser lenses are not shown, since they form no part of this invention, and they are not as evident to anyoneacquainted to the art. In front the short tube 2 is connected to the film guide i8. A corresponding tube 28 is fitted to the door Wall 8 so that, when the door is'closed, these tivo tubes, which are preferably iitted with' flanges, as shown the drawing, will meet. The tubes 26, 27, 28 thus forni a tunnel which penetrates tfie casing and allows of the rays of light passing through, but at the same time separating the passage for the part of the casing.

ln Fig. 4 a further constructional form is shown in diagram. Here two horizontal intermediate walls 29, 8O are provided in the casing, which, by transsecting the whole depth of the casing, form the two chambers l and ll and leave therebetween a space fopen atback and front, free for the passage of the rays, these Walls 29, 550 are connected with each other by the film guide i8.

ln the third constructional form exempliied in Flg. 5 the angular partitions 3l,

e2 form the bottom and roof respectively of -vidual picture and for the passage of ideas-3o tivo completely separate casings I and Il,

which are connected .with each other only y bythe film guide 1S and theparts of the frame required for journaling the Works and other purposes. The door is therefore also made of an according shape, consisting of two plates connected' by the bridge 33 and having,.in place of a continuous front 8 only the part 3i required for carrying the lens 10.

l claim:

l. In cinematograph projectors, ay casing composed cf fire-proof material and inclosing the iilin feeding mechanism, said casing having a door at one side thereof, said door carrying a tube at the front part thereof, the body of said casing containing the film feeding mechanism, and a film-guide behind the front wail of said body, a fire-proof tube in said body connecting With and behind said film-guide, and lire-proof means for connecting the tube in said casing and the tube in said door when said door is closed, so as to form a continuous passage for permitting the passage of the rays oflight from the source of light through the said tubes in the said body, and mounted on the said door, the lens being in front of the tube4 on the said door, said tubes in said body and casing shutting olf the place required for showing the individual picture, and for the passage of the rays of light, from the rays of the casing contained in the feeding mech anism.

2. ln cineniatograph projectors with a casing inclosing the iilm feeding mechanism in la ireproof manner, and means for shutting off the space required for showing the indithe rays of light from the other part of the casing containing the feeding mechanism, a door for closing the projector', said door having an angular section, the-projector lens fitted in the forward flange of the said angular *"tlosed.

lntestimony that l claim the foregoing as my invention, l have signed my name in presence of tivo subscribing Witnesses.

FRANZ-MAX HERMANN WUNDERLICH. Witnesses:

PAUL REAS, GUs'rAv ll/lLLiiii. 

